if (cls.isArray()) {
                evaluateArray(target);
            } else if (isQualifiedForInterpolation(cls)) {
                Field[] fields = FIELDS_BY_CLASS.computeIfAbsent(cls, k -> cls.getDeclaredFields());

                for (Field field : fields) {
                    Class<?> type = field.getType();
                    if (isQualifiedForInterpolation(field, type)) {

      try {
        return AccessController.doPrivileged(
            (PrivilegedExceptionAction<Unsafe>)
                () -> {
                  Class<Unsafe> k = Unsafe.class;
                  for (Field f : k.getDeclaredFields()) {
                    f.setAccessible(true);
                    Object x = f.get(null);
                    if (k.isInstance(x)) {
                      return k.cast(x);
                    }

          new PrivilegedExceptionAction<Unsafe>() {
            @Override
            public Unsafe run() throws Exception {
              Class<Unsafe> k = Unsafe.class;
              for (Field f : k.getDeclaredFields()) {
                f.setAccessible(true);
                Object x = f.get(null);
                if (k.isInstance(x)) return k.cast(x);
              }
              throw new NoSuchFieldError("the Unsafe");

          new PrivilegedExceptionAction<Unsafe>() {
            @Override
            public Unsafe run() throws Exception {
              Class<Unsafe> k = Unsafe.class;
              for (Field f : k.getDeclaredFields()) {
                f.setAccessible(true);
                Object x = f.get(null);
                if (k.isInstance(x)) return k.cast(x);
              }
              throw new NoSuchFieldError("the Unsafe");

            new PrivilegedExceptionAction<Unsafe>() {
              @Override
              public Unsafe run() throws Exception {
                Class<Unsafe> k = Unsafe.class;
                for (Field f : k.getDeclaredFields()) {
                  f.setAccessible(true);
                  Object x = f.get(null);
                  if (k.isInstance(x)) return k.cast(x);
                }

      return arbitraryConstantInstanceOrNull(type);
    }
  }

  private static <T> @Nullable T arbitraryConstantInstanceOrNull(Class<T> type) {
    Field[] fields = type.getDeclaredFields();
    Arrays.sort(fields, BY_FIELD_NAME);
    for (Field field : fields) {
      if (Modifier.isPublic(field.getModifiers())
          && Modifier.isStatic(field.getModifiers())

     * クラスまたはインターフェースに定義されたフィールドを追加します。
     *
     * @param clazz
     *            対象のクラスまたはインターフェース
     */
    protected void addFieldDescs(final Class<?> clazz) {
        for (final Field field : clazz.getDeclaredFields()) {
            final String fname = field.getName();
            if (fieldDescCache.containsKey(fname)) {
                continue;
            }
            setFieldAccessible(field);

  }

  @J2ktIncompatible
  @GwtIncompatible // reflection
  private static FluentIterable<Field> getConstantFields() {
    return FluentIterable.from(asList(MediaType.class.getDeclaredFields()))
        .filter(
            new Predicate<Field>() {
              @Override
              public boolean apply(Field input) {
                int modifiers = input.getModifiers();

      return arbitraryConstantInstanceOrNull(type);
    }
  }

  private static <T> @Nullable T arbitraryConstantInstanceOrNull(Class<T> type) {
    Field[] fields = type.getDeclaredFields();
    Arrays.sort(fields, BY_FIELD_NAME);
    for (Field field : fields) {
      if (Modifier.isPublic(field.getModifiers())
          && Modifier.isStatic(field.getModifiers())